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histogram/test/axis_regular_test.cpp

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// Copyright 2015-2017 Hans Dembinski
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt
// or copy at http://www.boost.org/LICENSE_1_0.txt)
#include <boost/core/lightweight_test.hpp>
#include <boost/histogram/axis/regular.hpp>
#include <limits>
#include <sstream>
#include "is_close.hpp"
#include "utility_axis.hpp"
using namespace boost::histogram;
namespace tr = axis::transform;
int main() {
// bad_ctors
{
BOOST_TEST_THROWS(axis::regular<>(1, 0, 0), std::invalid_argument);
BOOST_TEST_THROWS(axis::regular<>(0, 0, 1), std::invalid_argument);
}
// ctors and assignment
{
axis::regular<> a{4, -2, 2};
axis::regular<> b;
BOOST_TEST_NE(a, b);
b = a;
BOOST_TEST_EQ(a, b);
b = b;
BOOST_TEST_EQ(a, b);
axis::regular<> c = std::move(b);
BOOST_TEST_EQ(c, a);
axis::regular<> d;
BOOST_TEST_NE(c, d);
d = std::move(c);
BOOST_TEST_EQ(d, a);
}
// input, output
{
axis::regular<> a{4, -2, 2};
BOOST_TEST_EQ(a.bin(-1).lower(), -std::numeric_limits<double>::infinity());
BOOST_TEST_EQ(a.bin(a.size()).upper(), std::numeric_limits<double>::infinity());
BOOST_TEST_EQ(a.index(-10.), -1);
BOOST_TEST_EQ(a.index(-2.1), -1);
BOOST_TEST_EQ(a.index(-2.0), 0);
BOOST_TEST_EQ(a.index(-1.1), 0);
BOOST_TEST_EQ(a.index(0.0), 2);
BOOST_TEST_EQ(a.index(0.9), 2);
BOOST_TEST_EQ(a.index(1.0), 3);
BOOST_TEST_EQ(a.index(10.), 4);
BOOST_TEST_EQ(a.index(-std::numeric_limits<double>::infinity()), -1);
BOOST_TEST_EQ(a.index(std::numeric_limits<double>::infinity()), 4);
BOOST_TEST_EQ(a.index(std::numeric_limits<double>::quiet_NaN()), 4);
}
// with inverted range
{
axis::regular<> a{2, 1, -2};
BOOST_TEST_EQ(a.bin(-1).lower(), std::numeric_limits<double>::infinity());
BOOST_TEST_EQ(a.bin(0).lower(), 1);
BOOST_TEST_EQ(a.bin(1).lower(), -0.5);
BOOST_TEST_EQ(a.bin(2).lower(), -2);
BOOST_TEST_EQ(a.bin(2).upper(), -std::numeric_limits<double>::infinity());
BOOST_TEST_EQ(a.index(2), -1);
BOOST_TEST_EQ(a.index(1.001), -1);
BOOST_TEST_EQ(a.index(1), 0);
BOOST_TEST_EQ(a.index(0), 0);
BOOST_TEST_EQ(a.index(-0.499), 0);
BOOST_TEST_EQ(a.index(-0.5), 1);
BOOST_TEST_EQ(a.index(-1), 1);
BOOST_TEST_EQ(a.index(-2), 2);
BOOST_TEST_EQ(a.index(-20), 2);
}
// with log transform
{
axis::regular<double, tr::log> b{2, 1e0, 1e2};
BOOST_TEST_EQ(b.bin(-1).lower(), 0.0);
BOOST_TEST_IS_CLOSE(b.bin(0).lower(), 1.0, 1e-9);
BOOST_TEST_IS_CLOSE(b.bin(1).lower(), 10.0, 1e-9);
BOOST_TEST_IS_CLOSE(b.bin(2).lower(), 100.0, 1e-9);
BOOST_TEST_EQ(b.bin(2).upper(), std::numeric_limits<double>::infinity());
BOOST_TEST_EQ(b.index(-1), 2); // produces NaN in conversion
BOOST_TEST_EQ(b.index(0), -1);
BOOST_TEST_EQ(b.index(1), 0);
BOOST_TEST_EQ(b.index(9), 0);
BOOST_TEST_EQ(b.index(10), 1);
BOOST_TEST_EQ(b.index(90), 1);
BOOST_TEST_EQ(b.index(100), 2);
BOOST_TEST_EQ(b.index(std::numeric_limits<double>::infinity()), 2);
}
// with sqrt transform
{
axis::regular<double, tr::sqrt> a(2, 0, 4);
// this is weird, but -inf * -inf = inf, thus the lower bound
BOOST_TEST_EQ(a.bin(-1).lower(), std::numeric_limits<double>::infinity());
BOOST_TEST_IS_CLOSE(a.bin(0).lower(), 0.0, 1e-9);
BOOST_TEST_IS_CLOSE(a.bin(1).lower(), 1.0, 1e-9);
BOOST_TEST_IS_CLOSE(a.bin(2).lower(), 4.0, 1e-9);
BOOST_TEST_EQ(a.bin(2).upper(), std::numeric_limits<double>::infinity());
BOOST_TEST_EQ(a.index(-1), 2); // produces NaN in conversion
BOOST_TEST_EQ(a.index(0), 0);
BOOST_TEST_EQ(a.index(0.99), 0);
BOOST_TEST_EQ(a.index(1), 1);
BOOST_TEST_EQ(a.index(3.99), 1);
BOOST_TEST_EQ(a.index(4), 2);
BOOST_TEST_EQ(a.index(100), 2);
BOOST_TEST_EQ(a.index(std::numeric_limits<double>::infinity()), 2);
}
// with step
{
axis::regular<> a(axis::step(0.5), 1, 3);
BOOST_TEST_EQ(a.size(), 4);
BOOST_TEST_EQ(a.bin(-1).lower(), -std::numeric_limits<double>::infinity());
BOOST_TEST_EQ(a.value(0), 1);
BOOST_TEST_EQ(a.value(1), 1.5);
BOOST_TEST_EQ(a.value(2), 2);
BOOST_TEST_EQ(a.value(3), 2.5);
BOOST_TEST_EQ(a.value(4), 3);
BOOST_TEST_EQ(a.bin(4).upper(), std::numeric_limits<double>::infinity());
axis::regular<> b(axis::step(0.5), 1, 3.1);
BOOST_TEST_EQ(a, b);
}
// with circular option
{
axis::circular<> a{4, 0, 1};
BOOST_TEST_EQ(a.bin(-1).lower(), a.bin(a.size() - 1).lower() - 1);
BOOST_TEST_EQ(a.index(-1.0 * 3), 0);
BOOST_TEST_EQ(a.index(0.0), 0);
BOOST_TEST_EQ(a.index(0.25), 1);
BOOST_TEST_EQ(a.index(0.5), 2);
BOOST_TEST_EQ(a.index(0.75), 3);
BOOST_TEST_EQ(a.index(1.0), 0);
BOOST_TEST_EQ(a.index(std::numeric_limits<double>::infinity()), 4);
BOOST_TEST_EQ(a.index(-std::numeric_limits<double>::infinity()), 4);
BOOST_TEST_EQ(a.index(std::numeric_limits<double>::quiet_NaN()), 4);
}
// with growth
{
axis::regular<double, tr::id, axis::null_type, axis::option::growth> a{1, 0, 1};
BOOST_TEST_EQ(a.size(), 1);
BOOST_TEST_EQ(a.update(0), std::make_pair(0, 0));
BOOST_TEST_EQ(a.size(), 1);
BOOST_TEST_EQ(a.update(1), std::make_pair(1, -1));
BOOST_TEST_EQ(a.size(), 2);
BOOST_TEST_EQ(a.value(0), 0);
BOOST_TEST_EQ(a.value(2), 2);
BOOST_TEST_EQ(a.update(-1), std::make_pair(0, 1));
BOOST_TEST_EQ(a.size(), 3);
BOOST_TEST_EQ(a.value(0), -1);
BOOST_TEST_EQ(a.value(3), 2);
BOOST_TEST_EQ(a.update(-10), std::make_pair(0, 9));
BOOST_TEST_EQ(a.size(), 12);
BOOST_TEST_EQ(a.value(0), -10);
BOOST_TEST_EQ(a.value(12), 2);
BOOST_TEST_EQ(a.update(std::numeric_limits<double>::infinity()),
std::make_pair(a.size(), 0));
BOOST_TEST_EQ(a.update(std::numeric_limits<double>::quiet_NaN()),
std::make_pair(a.size(), 0));
BOOST_TEST_EQ(a.update(-std::numeric_limits<double>::infinity()),
std::make_pair(-1, 0));
}
// iterators
{
test_axis_iterator(axis::regular<>(5, 0, 1), 0, 5);
test_axis_iterator(
axis::regular<double, tr::id, axis::null_type, axis::option::none>(5, 0, 1), 0,
5);
test_axis_iterator(axis::circular<>(5, 0, 1), 0, 5);
}
// bin_type streamable
{
auto test = [](const auto& x, const char* ref) {
std::ostringstream os;
os << x;
BOOST_TEST_EQ(os.str(), std::string(ref));
};
auto a = axis::regular<>(2, 0, 1);
test(a.bin(0), "[0, 0.5)");
}
// shrink and rebin
{
using A = axis::regular<>;
auto a = A(5, 0, 5);
auto b = A(a, 1, 4, 1);
BOOST_TEST_EQ(b.size(), 3);
BOOST_TEST_EQ(b.value(0), 1);
BOOST_TEST_EQ(b.value(3), 4);
auto c = A(a, 0, 4, 2);
BOOST_TEST_EQ(c.size(), 2);
BOOST_TEST_EQ(c.value(0), 0);
BOOST_TEST_EQ(c.value(2), 4);
auto e = A(a, 1, 5, 2);
BOOST_TEST_EQ(e.size(), 2);
BOOST_TEST_EQ(e.value(0), 1);
BOOST_TEST_EQ(e.value(2), 5);
}
// shrink and rebin with circular option
{
using A = axis::circular<>;
auto a = A(4, 1, 5);
BOOST_TEST_THROWS(A(a, 1, 4, 1), std::invalid_argument);
BOOST_TEST_THROWS(A(a, 0, 3, 1), std::invalid_argument);
auto b = A(a, 0, 4, 2);
BOOST_TEST_EQ(b.size(), 2);
BOOST_TEST_EQ(b.value(0), 1);
BOOST_TEST_EQ(b.value(2), 5);
}
return boost::report_errors();
}
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